<h2>DESCRIPTION</h2>

File <em>map</em> is used as reference file.
Cells in the mask are marked as "mask out" if the corresponding cell in
<em>map</em> contains a value in the range specified with <em>maskvalues</em>.
<p>Before a new 3D-mask can be created the exisitng mask has to be removed
with <em>g.remove</em>.

<h2>SEE ALSO</h2>

<em>
<a href="g.remove.html">g.remove</a>
</em>

<h2>AUTHORS</h2>
Roman Waupotitsch, Michael Shapiro, 
Helena Mitasova, Bill Brown, Lubos Mitas,
Jaro Hofierka

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